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A260012
Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101.
1
436, 1232, 6944, 25600, 87024, 294336, 1231648, 4380288, 16773440, 58243968, 231701952, 814232832, 3185356416, 11129195264, 43863022976, 153683692032, 603684726016, 2112267329024, 8309822447360, 29094787617792, 114381212785152
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OFFSET
1,1
COMMENTS
Column 5 of
A260015
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-2) +108*a(n-4) -288*a(n-6) -1828*a(n-8) +4768*a(n-10) +4128*a(n-12) -11008*a(n-14) -4608*a(n-16) +4096*a(n-18) for n>21
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..1..0....0..0..1..0..0..0..0....1..0..1..0..1..0..1
..0..0..1..0..1..0..0....0..0..0..1..0..1..0....0..1..0..1..0..1..0
..0..1..0..1..0..1..0....0..0..1..0..1..0..1....1..0..1..0..1..0..1
..0..0..1..0..1..0..0....0..1..0..1..0..1..0....0..0..0..1..0..1..0
..0..1..0..1..0..1..0....1..0..1..0..1..0..1....1..0..0..0..1..0..1
..0..0..1..0..1..0..0....0..1..0..0..0..0..0....0..1..0..1..0..0..0
CROSSREFS
Cf.
A260015
Sequence in context:
A345808
A260366
A250781
*
A234221
A255777
A283928
Adjacent sequences:
A260009
A260010
A260011
*
A260013
A260014
A260015
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Jul 13 2015
STATUS
approved
